remove uses of runtimeType

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 4c49079..d24cf61 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md

@@ -1,7 +1,10 @@
+# 1.9.2
+
+* Remove the use of `runtimeType` from toString methods (#85).
+
 # 1.9.1
 
 * Properly handle multi-line labels for multi-span highlights.
-
 * Populate the pubspec `repository` field.
 
 # 1.9.0

diff --git a/analysis_options.yaml b/analysis_options.yaml
index 97c0552..18a9332 100644
--- a/analysis_options.yaml
+++ b/analysis_options.yaml

@@ -45,6 +45,7 @@
   - list_remove_unrelated_type
   - no_adjacent_strings_in_list
   - no_duplicate_case_values
+  - no_runtimeType_toString
   - non_constant_identifier_names
   - null_closures
   - omit_local_variable_types

diff --git a/lib/src/location.dart b/lib/src/location.dart
index 634863b..5eef45b 100644
--- a/lib/src/location.dart
+++ b/lib/src/location.dart

@@ -92,7 +92,7 @@
   int get hashCode => (sourceUrl?.hashCode ?? 0) + offset;
 
   @override
-  String toString() => '<$runtimeType: $offset $toolString>';
+  String toString() => '<SourceLocation: $offset $toolString>';
 }
 
 /// A base class for source locations with [offset], [line], and [column] known

diff --git a/lib/src/location_mixin.dart b/lib/src/location_mixin.dart
index bae38be..8650097 100644
--- a/lib/src/location_mixin.dart
+++ b/lib/src/location_mixin.dart

@@ -51,5 +51,5 @@
   int get hashCode => (sourceUrl?.hashCode ?? 0) + offset;
 
   @override
-  String toString() => '<$runtimeType: $offset $toolString>';
+  String toString() => '<SourceLocation: $offset $toolString>';
 }

diff --git a/lib/src/span_mixin.dart b/lib/src/span_mixin.dart
index 4d7bab4..6d8e7ae 100644
--- a/lib/src/span_mixin.dart
+++ b/lib/src/span_mixin.dart

@@ -80,5 +80,5 @@
   int get hashCode => Object.hash(start, end);
 
   @override
-  String toString() => '<$runtimeType: from $start to $end "$text">';
+  String toString() => '<SourceSpan: from $start to $end "$text">';
 }

diff --git a/pubspec.yaml b/pubspec.yaml
index 8bde1c2..916e8ea 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml

@@ -1,5 +1,5 @@
 name: source_span
-version: 1.9.1
+version: 1.9.2
 description: A library for identifying source spans and locations.
 repository: https://github.com/dart-lang/source_span
 

diff --git a/test/location_test.dart b/test/location_test.dart
index bbe259b..2910990 100644
--- a/test/location_test.dart
+++ b/test/location_test.dart

@@ -53,6 +53,11 @@
     });
   });
 
+  test('toString contains the class type', () {
+    final location = SourceLocation(15, line: 2, column: 6);
+    expect(location.toString(), startsWith('<SourceLocation'));
+  });
+
   test('distance returns the absolute distance between locations', () {
     final other = SourceLocation(10, sourceUrl: 'foo.dart');
     expect(location.distance(other), equals(5));

diff --git a/test/span_test.dart b/test/span_test.dart
index 22c498e..5e2034e 100644
--- a/test/span_test.dart
+++ b/test/span_test.dart

@@ -378,6 +378,11 @@
     });
   });
 
+  test('toString contains the class type', () {
+    final span = SourceSpan(SourceLocation(5), SourceLocation(5), '');
+    expect(span.toString(), startsWith('<SourceSpan'));
+  });
+
   group('compareTo()', () {
     test('sorts by start location first', () {
       final other = SourceSpan(SourceLocation(6, sourceUrl: 'foo.dart'),